diff --git a/src/fastmcp/server/auth/providers/azure.py b/src/fastmcp/server/auth/providers/azure.py
index cd1de2c4a..3caa2b085 100644
--- a/src/fastmcp/server/auth/providers/azure.py
+++ b/src/fastmcp/server/auth/providers/azure.py
@@ -220,7 +220,7 @@ class AzureProvider(OAuthProxy):
         token_verifier = JWTVerifier(
             jwks_uri=jwks_uri,
             issuer=issuer,
-            audience=client_id,
+            audience=self.identifier_uri,
             algorithm="RS256",
             required_scopes=validation_scopes,  # Only validate non-OIDC scopes
             http_client=http_client,
@@ -627,7 +627,7 @@ class AzureJWTVerifier(JWTVerifier):
         super().__init__(
             jwks_uri=f"https://{base_authority}/{tenant_id}/discovery/v2.0/keys",
             issuer=issuer,
-            audience=client_id,
+            audience=self._identifier_uri,
             algorithm="RS256",
             required_scopes=required_scopes,
         )
diff --git a/tests/server/auth/providers/test_azure.py b/tests/server/auth/providers/test_azure.py
index d83bc8860..3bde8ead8 100644
--- a/tests/server/auth/providers/test_azure.py
+++ b/tests/server/auth/providers/test_azure.py
@@ -211,7 +211,7 @@ class TestAzureProvider:
             "https://login.microsoftonline.com/my-tenant/discovery/v2.0/keys"
         )
         assert verifier.issuer == "https://login.microsoftonline.com/my-tenant/v2.0"
-        assert verifier.audience == "test_client"
+        assert verifier.audience == "api://my-api"
         # Scopes are stored unprefixed for token validation
         # (Azure returns unprefixed scopes like ".default" in JWT tokens)
         assert verifier.required_scopes == [".default"]
diff --git a/tests/server/auth/providers/test_azure_scopes.py b/tests/server/auth/providers/test_azure_scopes.py
index edbfa3165..beaeb8b8e 100644
--- a/tests/server/auth/providers/test_azure_scopes.py
+++ b/tests/server/auth/providers/test_azure_scopes.py
@@ -413,7 +413,7 @@ class TestAzureJWTVerifier:
             == "https://login.microsoftonline.com/my-tenant-id/discovery/v2.0/keys"
         )
         assert verifier.issuer == "https://login.microsoftonline.com/my-tenant-id/v2.0"
-        assert verifier.audience == "my-client-id"
+        assert verifier.audience == "api://my-client-id"
         assert verifier.algorithm == "RS256"
         assert verifier.required_scopes == ["access_as_user"]
 
@@ -431,7 +431,7 @@ class TestAzureJWTVerifier:
         token = key_pair.create_token(
             subject="test-user",
             issuer="https://login.microsoftonline.com/my-tenant-id/v2.0",
-            audience="my-client-id",
+            audience="api://my-client-id",
             additional_claims={"scp": "access_as_user"},
         )
         result = await verifier.load_access_token(token)